Problem: A large banner with word CODEFORCES was ordered for the 1000-th onsite round of Codeforcesω that takes place on the Miami beach. Unfortunately, the company that made the banner mixed up two orders and delivered somebody else's banner that contains someone else's word. The word on the banner consists only of upper-case English letters.

There is very little time to correct the mistake. All that we can manage to do is to cut out some substring from the banner, i.e. several consecutive letters. After that all the resulting parts of the banner will be glued into a single piece (if the beginning or the end of the original banner was cut out, only one part remains); it is not allowed change the relative order of parts of the banner (i.e. after a substring is cut, several first and last letters are left, it is allowed only to glue the last letters to the right of the first letters). Thus, for example, for example, you can cut a substring out from string 'TEMPLATE' and get string 'TEMPLE' (if you cut out string AT), 'PLATE' (if you cut out TEM), 'T' (if you cut out EMPLATE), etc.

Help the organizers of the round determine whether it is possible to cut out of the banner some substring in such a way that the remaining parts formed word CODEFORCES.

Input

The single line of the input contains the word written on the banner. The word only consists of upper-case English letters. The word is non-empty and its length doesn't exceed 100 characters. It is guaranteed that the word isn't word CODEFORCES.

Output

Print 'YES', if there exists a way to cut out the substring, and 'NO' otherwise (without the quotes).

Examples

Input

CODEWAITFORITFORCES


Output

YES


Input

BOTTOMCODER


Output

NO


Input

DECODEFORCES


Output

YES


Input

DOGEFORCES


Output

NO

Solution (in JAVA):

Solution:
import java.io.*;
import java.util.*;

public class Main {
	
	static class Assert {
		
		static void check(boolean e) {
			if (!e) {
				throw new Error();
			}
		}
	}
	
	static class Scanner {
		
		StreamTokenizer in;
		
		Scanner(Reader r) {
			in = new StreamTokenizer(new BufferedReader(r));
			in.resetSyntax();
			in.whitespaceChars(0, 32);
			in.wordChars(33, 255);
		}
		
		String next() {
			try {
				in.nextToken();
				Assert.check(in.ttype == in.TT_WORD);
				return in.sval;
			} catch (IOException e) {
				throw new Error(e);
			}
		}
		
		int nextInt() {
			return Integer.parseInt(next());
		}
		
		long nextLong() {
			return Long.parseLong(next());
		}
		
		double nextDouble() {
			return Double.parseDouble(next());
		}
	}

	static class FastScanner {
        BufferedReader br;
        StringTokenizer st;

        FastScanner(InputStream in) throws IOException {
            br = new BufferedReader(new InputStreamReader(in));
        }

        String next() {
            try {
                while (st == null || !st.hasMoreTokens()) {
                    st = new StringTokenizer(br.readLine());
                }
            } catch (IOException e) {
                System.err.println(e);
                System.exit(1);
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }
		
	double nextDouble() {
		return Double.parseDouble(next());
	}
    }
	
	FastScanner in;
	
	//Scanner in;

	PrintWriter out;
	
	void solve() {
		
		String s = in.next();
		
		int n = s.length();
		
		for (int i = 0; i < n; ++i) {
			for (int j = i; j < n; ++j) {
				
				String leftString = "";
				
				for (int z = 0; z < i; ++z) {
					leftString += s.charAt(z);
				}
				
				String rightString = "";
				
				for (int z = j + 1; z < n; ++z) {
					rightString += s.charAt(z);
				}
				
				String currString = leftString + rightString;
				
				if (currString.compareTo("CODEFORCES") == 0) {
					out.println("YES");
					return;
				}
			}
		}
		
		out.println("NO");
	}
	
	void run() {
		try {
			in = new FastScanner(System.in);
			out = new PrintWriter(System.out);
			//in = new Scanner(new FileReader("input.txt"));
			//out = new PrintWriter(new FileWriter("output.txt"));
		} catch (IOException e) {
			throw new Error(e);
		}
		try {
			solve();
		} finally {
			out.close();
		}
	}
	
	public static void main(String args[]) {
		new Main().run();
	}
}